PitBull Unit Frames 4.0

v4.0.0-beta47-6-gb25af6f-nolib

Change log

Shefki:
- Stash the DEFAULT_FONT and DEFAULT_FONT_SIZE so I can get people having the font problem to show me what's being stored.
- Wrap the SetFont and SetAlpha calls in pcalls() which should prevent errors with them from breaking frames entirely.
- Make the Vengeance fix backwards compatible.
Benjamin Staneck:
- use a different ID for vengeance that works in 5.4
Shefki:
- Remove unnecessary constants that I added on accident.
- Hopefully stop some rare errors in LuaTexts about SetFont.